JP3972908B2 - Bathtub microbubble generator - Google Patents

Description

The present invention relates to a microbubble generator for a bathtub capable of reducing jet noise.

Conventionally, the gas-liquid dissolving fluid gas in bath water is dissolved under pressure by pressure relief by the pressure reducing valve, bath microbubble generating apparatus that ejects discharged from the discharge hole in the bathtub while generating fine bubbles (For example, refer to Patent Document 1).
JP-A-11-33071

However, injection noise at the time of fine air bubbles caused by the reduced pressure valve there is a problem that is directly radiated into the bathroom.

This invention is made | formed in order to eliminate the said problem, and makes it a subject to provide the fine bubble generator of the bathtub which can reduce injection noise effectively.

In order to solve the above problems, first means of claim 1 of the present invention is to pressure relief in the gas is dissolved under pressure to gas-liquid dissolving fluid pressure reducing valve (18) in bath water, fine bubbles In the fine bubble generating device of the bathtub (1) that is ejected and discharged from the discharge hole (3) into the bathtub (1) while generating the discharge, the discharge port (3) formed in the bathtub wall (1a) of the bathtub (1) A bathtub fixing tool (21) is fitted into the tank fixing tool (21), and the pressure reducing valve (18) is installed inside the bathtub fixing tool (21). A nozzle cover (25) forming a discharge side periphery of the pressure reducing valve (18). The nozzle cover (25) is provided with a mesh body (28A) that is rounded into a cylindrical shape so as to surround the periphery of the discharge side .

According to a second means of the present invention, the gas-liquid dissolved fluid in which the gas is pressurized and dissolved in the bath water is released by the pressure reducing valve (18) to generate fine bubbles and the discharge hole (3). In the fine bubble generator for the bathtub (1) that is jetted and discharged into the bathtub (1), the bathtub fixture (21) is fitted into the discharge port (3) formed in the bathtub wall (1a) of the bathtub (1). The pressure reducing valve (18) is installed inside the bathtub fixture (21). The pressure reducing valve (18) is provided with a nozzle cover (25) that forms the periphery of the discharge side. The nozzle cover (25 ) Is provided with a cylindrical elastic body (28B) so as to surround the periphery of the discharge side.

As in claim 3 of the present invention, in the first means of claim 1 or the second means of claim 2, the mesh body (28A) or the elastic body (28B) is provided in the nozzle cover (25). It is preferable that a step (25b) is provided between the peripheral surface and the peripheral surface.

According to a third means of the present invention, the gas-liquid dissolved fluid in which the gas is pressurized and dissolved in the bath water is released by the pressure reducing valve (18) to generate fine bubbles and the discharge hole (3). In the fine bubble generator for the bathtub (1) that is jetted and discharged into the bathtub (1), the bathtub fixture (21) is fitted into the discharge port (3) formed in the bathtub wall (1a) of the bathtub (1). The pressure reducing valve (18) is installed inside the bathtub fixture (21). The pressure reducing valve (18) is provided with a nozzle cover (25) that forms the periphery of the discharge side. The nozzle cover (25 ) Is provided with a tapered cone (28C) in the discharge direction at the center on the discharge side.

According to the first means of the present invention, since the mesh body rounded in a cylindrical shape so as to surround the periphery of the discharge side is provided inside the nozzle cover of the pressure reducing valve, diffusion of pulsation by the mesh body is provided. Due to the damping action, the injection noise when the fine bubbles are generated by the pressure reducing valve is effectively reduced.

According to the second means of the present invention, since the cylindrical elastic body is provided inside the nozzle cover of the pressure reducing valve so as to surround the discharge side, the pulsation absorption and attenuation action by the elastic body is provided. The injection noise when the fine bubbles are generated by the pressure reducing valve is effectively reduced.

According to the third aspect of the present invention, by providing the mesh body or the elastic body so as not to generate a step portion between the inner peripheral surface of the nozzle cover, turbulence is hardly generated near the outer periphery of the discharge hole. Noise due to turbulent flow is effectively reduced.

According to the third means of the present invention, since the conical portion tapered in the discharge direction is provided at the center of the discharge side inside the nozzle cover of the pressure reducing valve, the rectifying action of the conical body causes the discharge hole to be Since turbulent flow is less likely to occur near the center, noise due to turbulent flow is effectively reduced.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 5, a suction inlet 2 and a discharge outlet 3 are formed in the bathtub wall 1 a of the bathtub 1, and the suction inlet 2 is connected to an inlet of an air suction part (ejector) 5 through a connection pipe 4. The outlet of the air suction unit 5 is connected to a pump 7 via a connection pipe 6.

  On the back surface of the flange portion of the bathtub 1, an air intake portion 11 composed of a check valve 8, a throttle valve 9, and a filter 10 is installed. The air intake portion 11 is connected via a connecting pipe 12. It is connected to the side of the air suction part 5.

  The pump 7 is connected to a spray nozzle 15 provided on the upper portion of the gas-liquid dissolution tank 14 via a connecting pipe 13, and the gas-liquid dissolution tank 14 is provided with an air vent valve 16.

  A lower portion of the gas-liquid dissolution tank 14 is connected to the discharge port 3 through a connection pipe 17, and a pressure reducing valve 18 is installed in the discharge port 3.

  And if the pump 7 is driven by switch operation, the bath water in the bathtub 1 will be absorbed by the pump 7 via the connection pipes 4 and 6 from the suction inlet 2, and the air suction part (ejector) in the middle of that The negative pressure action 5 causes the air taken in from the air intake 11 to be mixed into the bath water.

  The bath water mixed with the air is jetted from the spray nozzle 15 into the gas-liquid dissolution tank 14 through the connecting pipe 13 from the pump 7 and enters a bubbling state. Excess air in the gas-liquid dissolution tank 14 is discharged from the air vent valve 16 to the outside of the tank.

  The bath water in the gas-liquid dissolution tank 14 is discharged into the bathtub 1 from the discharge port 3 while being converted into bath water containing white fine cloudy bubbles by the pressure reducing valve 18.

  By repeating such circulation of the bath water, the inside of the bathtub 1 is filled with bath water with fine bubbles.

  FIG. 1A is a detailed plan sectional view of the pressure reducing valve 18 installed in the discharge port 3. A ring-shaped packing 20 is attached to the inner peripheral edge of the discharge port 3, and a bathtub fixture 21 is fitted into the packing 20 from the inside of the bathtub 1 in a watertight manner, and at the rear end 21 a of the bathtub fixture 21. The front end flange portion 17a of the connection pipe 17 is connected in a watertight manner. A discharge port cover 22 having an opening 22 a is attached to the flange portion 21 b of the bathtub fixture 21.

  The pressure reducing valve 18 is installed across the inside of the bathtub fixture 21 and the inside of the front end flange portion 17 a of the connecting pipe 17. The pressure reducing valve 18 includes a supply side nozzle portion 23 and a discharge side nozzle portion 24.

  The supply-side nozzle portion 23 includes a substantially cylindrical supply-side nozzle body 23a, and a decompression opening 23b is formed at the center of the supply-side nozzle body 23a. The decompression opening 23b is for discharging the pressure-dissolved gas-liquid dissolution bath water and releasing the pressure. A smooth opening peripheral surface 23c is formed at the opening periphery of the decompression opening 23b. An arc concave ring groove 23d (see FIG. 1B) is formed on the peripheral edge surface 23c along the periphery of the decompression opening 23b.

The discharge-side nozzle portion 24 includes a substantially cylindrical discharge-side nozzle body 24a. At the rear end of the discharge-side nozzle body 24a, the discharge-side nozzle body 24a faces the decompression opening 23b and has a predetermined clearance S from the opening peripheral surface 23c. A pressure release surface 24b is formed separating the two. A concave ring groove 24c (see FIG. 1C) is formed around the pressure release surface 24b, and the bottom of the ring groove 24c is equiangular on the circumference (45 degrees in this example). A plurality of discharge holes 24d are formed. The discharge hole 24d is for injecting and discharging fine bubbles generated in the gap S between the opening peripheral surface 23c and the pressure release surface 24b into the bathtub 1.

  The discharge-side nozzle portion 24 is provided with a nozzle cover 25 that forms the periphery of the discharge side of the discharge hole 24d, and an opening 25a that opposes the opening 22a of the discharge port cover 22 is formed on the upper portion thereof, A stepped portion 25b is formed on the inner peripheral surface so as to be wider than the outer periphery of the discharge hole 24d. The step portion 25b is formed by screwing a female screw formed on the inner periphery of the rear end of the nozzle cover 25 into a male screw formed on the outer periphery of the front end of the discharge side nozzle main body 24a. This occurs when combined.

The pressure reducing valve 18 is a seal ring of the supply-side nozzle main body 23a in a state where the position in the front-rear direction is regulated between the recess 22b of the opening 22a of the discharge port cover 22 and the hook portion 21c of the bathtub fixture 21. 26 is watertightly fitted inside the front end flange portion 17a of the connecting pipe 17.

In the configuration of the pressure reducing valve 18, when the gas-liquid dissolving bath water pressurized and dissolved from the connecting pipe 17 is supplied (see arrow P), the opening peripheral surface 23c and the pressure release from the pressure reducing opening 23b of the supply side nozzle body 23a. Since the pressure is abruptly reduced in the process of flowing through the gap S between the surface 24b, the air (gas) in the bath water boils under reduced pressure to generate fine bubbles, and is converted into bath water containing white fine cloudy bubbles. Then, the liquid is discharged from the discharge port 3 into the bathtub 1. At this time, since the turbulent flow of the bath water can be suppressed by the arc-shaped concave ring groove 23d of the supply side nozzle body 23a, the noise due to the turbulent flow in this portion can be effectively reduced.

  In the configuration of the pressure reducing valve 18, as shown in FIGS. 2 to 4, an injection noise attenuating means 28 (in the inside of the nozzle cover 25 that forms the discharge side periphery of the discharge hole 24 d of the discharge side nozzle portion 24 ( A to C) are installed.

  As shown in FIG. 2, the attenuating means 28 of the first embodiment is composed of a mesh body 28A that is rounded into a cylindrical shape so as to surround the discharge side periphery of the discharge hole 24d.

  The mesh body 28A has, for example, a mesh of about # 30 to 120, and the discharge side nozzle is formed so that the stepped portion 25b in the nozzle cover 25 is eliminated and the discharge side periphery of the discharge hole 24d becomes flat. It is provided between the front surface 24 e of the main body 24 a and the opening 25 a of the nozzle cover 25.

  If the mesh body 28A of the first embodiment is provided, the injection noise when the fine bubbles are generated by the pressure reducing valve 18 is effectively reduced by the pulsation diffusion attenuation action of the mesh body 28A. Further, the stepped portion 25b is not generated between the mesh body 28A and the inner peripheral surface of the nozzle cover 25, and turbulent flow is less likely to occur near the outer periphery of the discharge hole 24d. Will come to be.

  As shown in FIG. 3, the attenuating means 28 of the second embodiment is constituted by a cylindrical elastic body 28B so as to surround the discharge side periphery of the discharge hole 24d.

  For example, if the elastic body 28B is made of rubber, the elastic body 28B has a hardness of about 40 to 80, so that the step portion 25b in the nozzle cover 25 is eliminated, and the discharge side periphery of the discharge hole 24d becomes flat. The discharge side nozzle body 24 a is provided between the front surface 24 e of the discharge side nozzle body 24 a and the opening 25 a of the nozzle cover 25.

  If the elastic body 28B of the second embodiment is provided, the injection noise when the fine bubbles are generated by the pressure reducing valve 18 is effectively reduced by the pulsation absorption and attenuation action of the elastic body 28B. Further, the elastic body 28B prevents the stepped portion 25b from being formed between the inner peripheral surface of the nozzle cover 25 and makes it difficult for turbulent flow to occur near the outer periphery of the discharge hole 24d, thereby effectively reducing noise due to turbulent flow. Will come to be.

  As shown in FIG. 4, the attenuating means 28 of the third embodiment is composed of a cone 28C provided at the discharge side center of the discharge hole 24d.

  The conical body 28C may be made of metal or synthetic resin, and extends from the center of the front surface 24e of the discharge side nozzle body 24a while reducing its diameter to the front, and between the front surface 24e and the opening 25a of the nozzle cover 25. It is provided over. The cone 28C may be integrated with or separate from the discharge side nozzle portion 24.

  If the cone 28C of the third embodiment is provided, the rectifying action by the cone 28C makes it difficult for turbulent flow to occur near the center of the discharge hole 24d, so that noise due to turbulent flow is effectively reduced. Become.

  When the damping means 28 (A to C) of the first to third embodiments as shown in FIGS. 2 to 4 is installed in the pressure reducing valve 18 of FIG. 1, it is compared with the pressure reducing valve 18 of FIG. 1. In the mesh body 28A of the first embodiment, the noise is -5 dB (A characteristic), and in the elastic body 28B of the second embodiment, the noise is -6.2 dB (A characteristic), and the cone 28C of the third embodiment. Then, noise could be reduced by -3 dB (A characteristic), respectively.

  Note that the mesh body 28A or elastic body 28B of the first and second embodiments can be combined with the cone body 28C of the third embodiment. In this case, the injection noise when fine bubbles are generated by the pressure reducing valve 18 And noise due to turbulent flow are effectively reduced.

  Although the pressure reducing valve 18 of the above embodiment is configured by the supply-side nozzle portion 23 and the discharge-side nozzle portion 24, the present invention is not limited to this configuration.

It is the pressure-reduction valve of the bubble generating apparatus of a bathtub , (a) is a plane sectional view, (b) is the sectional view on the AA line of (a), (c) is the sectional view on the BB line of (a). . It is a mesh body of a 1st embodiment, (a) is a plane sectional view, (b) is a CC line sectional view of (a), and (c) is a perspective view. It is an elastic body of a 2nd embodiment, (a) is a plane sectional view, (b) is a DD line sectional view of (a), and (c) is a perspective view. It is a cone of 3rd Embodiment, (a) is a plane sectional view, (b) is a perspective view. It is a system diagram of the bubble generator of a bathtub.

Explanation of symbols

1 bathtub 18 pressure reducing valve 23 supply side nozzle part 23a supply side nozzle body 23b pressure reducing port 23c opening peripheral surface 24 discharge side nozzle part 24a discharge side nozzle body 24b pressure release surface 24c ring-shaped groove 24d discharge hole 25 nozzle cover 25b step part 28 Damping means 28A Mesh body 28B Elastic body 28C Cone body S Distance

Claims (4)

The gas-liquid dissolving fluid gas is dissolved under pressure in the bath water and pressure relief by the pressure reducing valve (18), to inject discharged from the discharge hole while generating fine bubbles (3) to the bathtub (1) in the bathtub ( In the fine bubble generator of 1) ,
A bathtub fixture (21) is fitted into the discharge port (3) formed in the bathtub wall (1a) of the bathtub (1), and the pressure reducing valve (18) is installed inside the bathtub fixture (21). The pressure reducing valve (18) is provided with a nozzle cover (25) that forms the periphery of the discharge side, and inside the nozzle cover (25), a mesh body that is rounded into a cylindrical shape so as to surround the periphery of the discharge side ( 28A) is provided, and the fine bubble generator for a bathtub is provided . The gas-liquid dissolved fluid in which the gas is dissolved under pressure in the bath water is released by the pressure reducing valve (18), and is ejected and discharged from the discharge hole (3) into the bathtub (1) while generating fine bubbles (1) )
A bathtub fixture (21) is fitted into the discharge port (3) formed in the bathtub wall (1a) of the bathtub (1), and the pressure reducing valve (18) is installed inside the bathtub fixture (21). The pressure reducing valve (18) is provided with a nozzle cover (25) that forms the periphery of the discharge side, and a cylindrical elastic body (28B) is provided inside the nozzle cover (25) so as to surround the periphery of the discharge side. A device for generating fine bubbles in a bathtub, which is provided . The mesh body (28A) or the elastic body (28B) is provided so that a step portion (25b) is not formed between the mesh body (28A) and the elastic body (28B) or the inner peripheral surface of the nozzle cover (25). 2. The apparatus for generating fine bubbles in a bathtub according to 2 . The gas-liquid dissolved fluid in which the gas is dissolved under pressure in the bath water is released by the pressure reducing valve (18), and is ejected and discharged from the discharge hole (3) into the bathtub (1) while generating fine bubbles (1) )
A bathtub fixture (21) is fitted into the discharge port (3) formed in the bathtub wall (1a) of the bathtub (1), and the pressure reducing valve (18) is installed inside the bathtub fixture (21). The pressure reducing valve (18) is provided with a nozzle cover (25) that forms the periphery of the discharge side, and a conical body (28C) tapered in the discharge direction is provided at the center of the discharge side inside the nozzle cover (25). A device for generating fine bubbles in a bathtub .

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